Automatic stoker.



D. T. WILLIAMS.

AUTOMATIC STOKER.

APPLICATION FILED ocT.29. 1913.

1,142,293. Patented June 8, 1915.

2 SHEETS-SHEET I.

% David .ZV/Q'Zla' 6177215;

ATTORNEY D. T. WILLIAMS.

AUTOMATIC STOKER.

APPLICATION FILED OCT. 29. 1913.

1,142,293. Patented June 8, 1915.

2 SHEETS-SHEET 2.

! F I V I i ATTORNEY.

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.pplicetion filed October 29, 1913. i N9. 7518,99}.

DAVID W land, residin ew Q TIi' a a at Petersen, in th State of N Je y e n nte 'e i'tein new and useful Improvements Autometie e're qt Whigh he fe leu e e P e Q-n? I certain furnaces where a cenduit, pipe ether ent r m e e tenden less into the space'of the furnace above the grate, r l fi ie2 I automatic stokerof theclass' which feeds the fuel upwardly through the fire, it is found that the intense heat of the fire makes 1t essential to protect such conveying means by some form of guard, "The.v'arious types of guards heretofore suggestefd for' this pur- To all whom, may concert Be it known that pose have"been found]unsuitable, pr1nc1 P y au t e w e n t pte t thstand the destructive action of the heat such: i equent' fe placement as to make their maintenance e ensive and troublesome."

ard which '7 y object is to provide a shall be substantially proof against-the destructive influence of the fire,'comparatively -simple and inexpensive. in construction,

- cinity use adapted to be readilyifitted in working position and designed to promote the properdisposition of the fuel, especially in the v1- of the means whereby it is elevated to, the level of the fuel bed. i My invention in the novel con-' struction and arrangement of a grate, a fuel conveying meansand a guard substantially as hereinafterset forth and finally embodied the clauses of the claims.

The invention consists, further, in certain details of construction designed to carry forwardthe objects of the invention in a manner at once practical, involving simplicity and economy of construction, and producing a high degree ofefficiency in-actual Referring to the accompanying drawings, wherein the invention is fully illustrated, Figure 1 is a vertical, substantially central, longitudinal sectional view of a locomotive fire-box and stoking mechanism provided with my. improvement; Fig. 2 is a plan view of the improvement, in full and partly in broken lines; Figs. 3 and 4 are "front and side elevations of one a d a h mg hew t e the t e el ry Port n f.

other parts appearing in Fig. 1 being also-shown, partly f th voseeti n of the ua and, F ee a gm i fo med an s p te j ewings, 15 e fireb xba k heets and t medse e lede the-l ng fi- .d e l e xe ba d and the rocking bars 6 and c, the former of which are journaled in the usual manner, each at one end in the central bar (Z. Sarfientral bar, order to accommodate el conveying means (to be described), is formed with its rear end bifurcated, as at d, the two members of its forked or bifu rc'atedportion being supported on the brackets f bolted or otherwise attached to the mud-ring; The grate bars 6', as will appear, may be pivotally supported at one end on the structure constituting the essenlit th In said 'tial feature of my inv ntion. The tubular conducting means throu h which the fuel is evated through the adaptation shown, substantially through S ch bed itself) is shown as including the horizontal and vertical tubular sections, 9 and h communicating with each other and suitably supported, the sectionh extending up through the recess formed in the bifurcation of the rear portion of the central grate bar 4. In the sections 9 and h. are shown the revolublescrews i and 7' for forwarding the fuel t ough the conducting means to the upper or discharge end of the section h where it either spills .over said discharge end of section It onto the grate or is distributed over the fire, according as the blast device In is not or'is operatingythe means for rotating said screws, forming no part of this invention, does not require description.

In the preferred form of the invention, I

. rovide a structure like that shown best 1n igs. 2, 3 and 4, the same including an upwhole. extent thereof, a horizontal platform m surmounting the wall I and provided with an opening or throat n to receive the section k of the conveying means, and a base portion 0. The general formation of this structure is such that when in position as shown in Fig. 1, it forms a space p around the portion of the section it that projects above the grateand well up toward the top thereof, whichspace, being open downwardly, forms raminous) a chamber for a body of air to insulate the said portion'of the sectiouk from the heat of the burning fuel-bed. The .wall Z is formed substantially throughout-its whole extent with slots 9 or other form of openings which give it a substantially foraminous character, the dis osition of such slots or openings being pre erably that shown in the drawings; similar slots or openings 9 may be formed in the platform m wherever necessary. The ba se 0 includesin the present instance an upright wall portion 0' which merges into the wall land a flat portion 0 inclined forwardly and downwardly at about the same angle as that of the grate structure. In order that the guard may be readily assembled with the ate structure and the conveying means it is divided centrally into two sections, the said sections having interior projections 1' through which, after said sections have been'placed in embracing relation to section h of the conveying means, bolts or other clamping means 8 may be passed to hold the sectiolfs together. The guard is supported, when in working position, by the central fixed gratebar d, the base 0 of the rear portion d of said grate-bar, and. it is held from sliding forward by thesocketsor recesses t in forward extensions o of its base being engaged with two trunnions-orlugs u on the grate-bar 03. (As shown, the extensions 0 are preferably formed fm The base 0 may be provided with lugs or for the shorter grate bars e.

In view of the foregoing it will be seen that the guard, which affords a lateral support to the body of fuel on the grate, forms around the part of the section h of the conveying means that projects above the grate a downwardly open air chamber for insulat-l ing said part from the heat of the body of fuel and that a copious supply of air is constantly fed to thechamber or space thus formed (and discharged therefrom through the passages in the guard, thus preventing the same from becoming overheated) because the ,fuel support itself affords air passages extending vertically therethrough from below and discharging upwardly into said space, the same existing both inside and directly outside ofthe wall formed by the rear bifurcated portion (1 of the fuel-support (see Fig. 1).

guard resting upon the forked 1 trunnions 'v afl'ording. bearings inaaaee the ard in a 'mannercalculated to cause the i bl to cover the openings in the ard when afresh fire is started and the fuel-bed .is therefore low, at which time if it were not for this stacking or piling of the fuel well up around the guard the openings therein would allow the draft to enter the fire-box over the fuel, instead of through'it,.which of course would have a deadening effect on the fire, at least in the vicinity of the introduction of the fuel.

Having thus fully described my invention,

what I claim as new and desire to secure by Letters Patent is 1. The combination of a grate, a fuelcon veying means having its delivery portion arranged over the gratefand an upstanding guard affording a lateral support for the fuel on the grate, and forming with said delivery portion a downwardly openspace and having passages discharging laterally from said space, and said grate having an air passage extending upwardly therethrough from below and discharging into said space.

2. In combination, with a furnace grate includin grate members one of which is fixed, a el conveyin means having its delivery portionexten g .frombelow to a point above the grate, and a passaged guard for said delivery portion of the conveying means carried by said fixed grate member, some ofthe remaining grate members being supported by the fixed grate member and others by the guard.

3.. In combination,- includin grate members one of which is fixed, a elconve livery portion exten from I below .to a point above the grate, said fixed means having its de with a furnace grate ate inem-.

her being formed to embrace said delivery portion of the conveying means, and-a assessed guard for said delivery portion o the conveying means extending around the same, some of the remaining grate members being supported by the fixed grate member I and others by the guard.

In. te timony whereof I afiix my signature in presence of two witnesses.

' DAVID T. WILLIAMS. I

Witnesses:

EMMA E. Bnox, R.-MoOR1MMoN. 

